a friend of mine (pitch254 i think his nick is) has, a tas50xx based class d digital amp.

Tweeters managed perfectly, no probs there. Only thing was that it gave so much hf junk on the speaker lines & the internal wiring that it had trouble locking on the spdif signal when turning up te volume. even at normal listening volumes it would sometimes lose the signal.

That, and the tv & radio were completely useless when the amp was playing music

matjans
the article deals (theoretically) with this problem. Some measures have to be taken during construction.
What i am interested in is the sound of the filterless versus the filtered (same) class D. Any experience?
The supplied URL does not work. Use this insteadhttp://focus.ti.com/lit/an/sloa023/sloa023.pdf

__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?

I've been measure a 2W stereo filterless class-D chip in the EMI anechonic chamber, a pair of speaker cable is only 30cm, the EMI radiation result is really bad even in the quiescence and supply voltage is only 5V, don't even think about rated power output.

Filterless type class-d is only suite for "no speaker cable outside" applications , You needs to install all componenents in a shielded case, such like a laytop PC or mobilephone.